Question

我有一个包含大约10个链接（项目）的静态网页。我的需求很简单：当用户点击链接时，在新的webview中打开。当用户返回菜单时，再次单击此链接，之前加载打开的webview（无需添加具有相同URL的新webview）。这是我的解决方案：保存已加载的网址，并在预加载新点击时进行检查。

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    if(navigationType == UIWebViewNavigationTypeLinkClicked) {
        if(![self checkIsAlreadyLoaded:request]) {
            // load new webview
            [self addWebView:request];
            return NO;
        }
    }
    return YES;
}

- (BOOL)checkIsAlreadyLoaded:(NSURLRequest *)request {
    NSString *urlToCheck = request.URL.absoluteString;
    NSLog(@"URL to check: %@", urlToCheck);
    for (int i = 0; i < self.visitedURLsArray.count; i++) {
        if([[self.visitedURLsArray objectAtIndex:i] isEqualToString:request.URL.absoluteString]) {
            NSLog(@"URL Found!");
            return YES;
        }
    }

    NSLog(@"*** NOT MATCHING ***");
    return NO;
}

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    if(![self.visitedURLsArray containsObject:webView.request.URL.absoluteString]) {
        NSLog(@"saved url: %@", webView.request.URL.absoluteString);
        [self.visitedURLsArray addObject:webView.request.URL.absoluteString];
    }
}

我的一些链接是Google链接，我对这些链接有疑问。例如：Google+网址：

起始网址： https://plus.google.com/app/basic?nopromo=1&source=mog&gl=jp
最终加载的网址： https://plus.google.com/collections/featured?gl=jp

由于保存的网址始终与起始网址不同，我无法打开保存的网址，我该如何处理？

Answer 1

在重定向之前保存网址//在@interface

中保存

@property NSURL *urlBeingLoaded;

....

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    if(navigationType == UIWebViewNavigationTypeLinkClicked) {
        if(![self checkIsAlreadyLoaded:request]) {
            // load new webview
            self.urlBeingLoaded = request.URL;
            [self addWebView:request];
            return NO;
        }
    }
    return YES;
}

- (BOOL)checkIsAlreadyLoaded:(NSURLRequest *)request {
    NSString *urlToCheck = request.URL.absoluteString;
    NSLog(@"URL to check: %@", urlToCheck);
    for (int i = 0; i < self.visitedURLsArray.count; i++) {
        if([[self.visitedURLsArray objectAtIndex:i] isEqualToString:request.URL.absoluteString]) {
            NSLog(@"URL Found!");
            return YES;
        }
    }

    NSLog(@"*** NOT MATCHING ***");
    return NO;
}

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    if(![self.visitedURLsArray containsObject:_urlBeingLoaded]) {
        NSLog(@"saved url: %@", _urlBeingLoaded);
        [self.visitedURLsArray addObject:self.urlBeingLoaded];
    }
}

如何检查UIWebview的URL是否已加载？

1 个答案: